/* ----------------------------------------------------------------------------- This source file is part of OGRE (Object-oriented Graphics Rendering Engine) For the latest info, see http://www.ogre3d.org/ Copyright (c) 2000-2009 Torus Knot Software Ltd Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ----------------------------------------------------------------------------- */ #include "OgreGLES2HardwareBufferManager.h" #include "OgreGLES2HardwareVertexBuffer.h" #include "OgreRoot.h" #include "OgreGLES2RenderSystem.h" namespace Ogre { GLES2HardwareVertexBuffer::GLES2HardwareVertexBuffer(HardwareBufferManagerBase* mgr, size_t vertexSize, size_t numVertices, HardwareBuffer::Usage usage, bool useShadowBuffer) : HardwareVertexBuffer(mgr, vertexSize, numVertices, usage, false, useShadowBuffer) { if (!useShadowBuffer) { OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Only supported with shadowBuffer", "GLES2HardwareVertexBuffer"); } glGenBuffers(1, &mBufferId); GL_CHECK_ERROR; if (!mBufferId) { OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Cannot create GL ES vertex buffer", "GLES2HardwareVertexBuffer::GLES2HardwareVertexBuffer"); } dynamic_cast(Root::getSingleton().getRenderSystem())->_bindGLBuffer(GL_ARRAY_BUFFER, mBufferId); glBufferData(GL_ARRAY_BUFFER, mSizeInBytes, NULL, GLES2HardwareBufferManager::getGLUsage(usage)); GL_CHECK_ERROR; } GLES2HardwareVertexBuffer::~GLES2HardwareVertexBuffer() { glDeleteBuffers(1, &mBufferId); GL_CHECK_ERROR; // Delete the cached value dynamic_cast(Root::getSingleton().getRenderSystem())->_deleteGLBuffer(GL_ARRAY_BUFFER, mBufferId); } void* GLES2HardwareVertexBuffer::lockImpl(size_t offset, size_t length, LockOptions options) { GLenum access = 0; if (mIsLocked) { OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Invalid attempt to lock an index buffer that has already been locked", "GLES2HardwareVertexBuffer::lock"); } void* retPtr = 0; GLES2HardwareBufferManager* glBufManager = static_cast(HardwareBufferManager::getSingletonPtr()); // Try to use scratch buffers for smaller buffers if (length < glBufManager->getGLMapBufferThreshold()) { // if this fails, we fall back on mapping retPtr = glBufManager->allocateScratch((uint32)length); if (retPtr) { mLockedToScratch = true; mScratchOffset = offset; mScratchSize = length; mScratchPtr = retPtr; mScratchUploadOnUnlock = (options != HBL_READ_ONLY); if (options != HBL_DISCARD) { // have to read back the data before returning the pointer readData(offset, length, retPtr); } } } else { OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Invalid Buffer lockSize", "GLES2HardwareVertexBuffer::lock"); } #if GL_OES_mapbuffer if (!retPtr) { // Use glMapBuffer dynamic_cast(Root::getSingleton().getRenderSystem())->_bindGLBuffer(GL_ARRAY_BUFFER, mBufferId); if(options == HBL_DISCARD) { // Discard the buffer glBufferData(GL_ARRAY_BUFFER, mSizeInBytes, NULL, GLES2HardwareBufferManager::getGLUsage(mUsage)); GL_CHECK_ERROR; } if (mUsage & HBU_WRITE_ONLY) access = GL_WRITE_ONLY_OES; void* pBuffer = glMapBufferOES(GL_ARRAY_BUFFER, access); GL_CHECK_ERROR; if(pBuffer == 0) { OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Vertex Buffer: Out of memory", "GLES2HardwareVertexBuffer::lock"); } // return offsetted retPtr = static_cast( static_cast(pBuffer) + offset); mLockedToScratch = false; } #endif mIsLocked = true; return retPtr; } void GLES2HardwareVertexBuffer::unlockImpl(void) { if (mLockedToScratch) { if (mScratchUploadOnUnlock) { // have to write the data back to vertex buffer writeData(mScratchOffset, mScratchSize, mScratchPtr, mScratchOffset == 0 && mScratchSize == getSizeInBytes()); } static_cast( HardwareBufferManager::getSingletonPtr())->deallocateScratch(mScratchPtr); mLockedToScratch = false; } else { #if GL_OES_mapbuffer dynamic_cast(Root::getSingleton().getRenderSystem())->_bindGLBuffer(GL_ARRAY_BUFFER, mBufferId); if(!glUnmapBufferOES(GL_ARRAY_BUFFER)) { OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Buffer data corrupted, please reload", "GLES2HardwareVertexBuffer::unlock"); } #else OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Only locking to scratch is supported", "GLES2HardwareVertexBuffer::unlockImpl"); #endif } mIsLocked = false; } void GLES2HardwareVertexBuffer::readData(size_t offset, size_t length, void* pDest) { if (mUseShadowBuffer) { void* srcData = mpShadowBuffer->lock(offset, length, HBL_READ_ONLY); memcpy(pDest, srcData, length); mpShadowBuffer->unlock(); } else { OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, "Read hardware buffer is not supported", "GLES2HardwareVertexBuffer::readData"); } } void GLES2HardwareVertexBuffer::writeData(size_t offset, size_t length, const void* pSource, bool discardWholeBuffer) { dynamic_cast(Root::getSingleton().getRenderSystem())->_bindGLBuffer(GL_ARRAY_BUFFER, mBufferId); // Update the shadow buffer if(mUseShadowBuffer) { void* destData = mpShadowBuffer->lock(offset, length, discardWholeBuffer ? HBL_DISCARD : HBL_NORMAL); memcpy(destData, pSource, length); mpShadowBuffer->unlock(); } if (offset == 0 && length == mSizeInBytes) { glBufferData(GL_ARRAY_BUFFER, mSizeInBytes, pSource, GLES2HardwareBufferManager::getGLUsage(mUsage)); GL_CHECK_ERROR; } else { if(discardWholeBuffer) { glBufferData(GL_ARRAY_BUFFER, mSizeInBytes, NULL, GLES2HardwareBufferManager::getGLUsage(mUsage)); GL_CHECK_ERROR; } glBufferSubData(GL_ARRAY_BUFFER, offset, length, pSource); GL_CHECK_ERROR; } } void GLES2HardwareVertexBuffer::_updateFromShadow(void) { if (mUseShadowBuffer && mShadowUpdated && !mSuppressHardwareUpdate) { const void *srcData = mpShadowBuffer->lock(mLockStart, mLockSize, HBL_READ_ONLY); dynamic_cast(Root::getSingleton().getRenderSystem())->_bindGLBuffer(GL_ARRAY_BUFFER, mBufferId); // Update whole buffer if possible, otherwise normal if (mLockStart == 0 && mLockSize == mSizeInBytes) { glBufferData(GL_ARRAY_BUFFER, mSizeInBytes, srcData, GLES2HardwareBufferManager::getGLUsage(mUsage)); GL_CHECK_ERROR; } else { // FIXME: GPU frequently stalls here - DJR glBufferSubData(GL_ARRAY_BUFFER, mLockStart, mLockSize, srcData); GL_CHECK_ERROR; } mpShadowBuffer->unlock(); mShadowUpdated = false; } } }